Sanitary napkin



FIG. 1 is a perspective view of a sanitary napkin embodying my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side being a mirror image thereof.

The broken lines illustrate a portion of the napkin that forms no part of the claimed design. 

The ornamental design for a sanitary napkin, as shown and described. 